Home / 20,231.28-27,918.54-11,278.26

Finding the Fourth Proportional to 20,231.28, 27,918.54 and 11,278.26

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Solution

The fourth proportional to 20,231.28, 27,918.54 and 11,278.26 is: 15,563.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.28 : 27,918.54 = 11,278.26 : x
  2. Step 2: Convert to fraction form
    20,231.28/27,918.54 = 11,278.26/x
  3. Step 3: Cross multiply
    20,231.28x = 27,918.54 × 11,278.26
  4. Step 4: Simplify right side
    20,231.28x = 314,872,552.94
  5. Step 5: Solve for x
    x = 314,872,552.94/20,231.28
  6. Step 6: Final answer
    x = 15,563.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.